Drill-press.



MERLISS. DRILL PRESS.

APPLICATION FILED DEC. 1, 1913.

Patented Jan. 19, 1915.

THE NORIS PETERS C04, PHOTO-LITHQ, WASHINGTON, D, C.

" HEfl sans @Fli C.

MOBDUCK MERLISS, or FLINT, MICHIGAN, nssieivon or ONE-HALF ro CLAUDE n.TR MLEY, or DETROIT, MICHIGAN.

DRILL-PRESS Specification of Letters Patent.

Patented J an. 19, 1915.

Application filed December 1, 1913. Serial No. 804,010.

To all whom it may concern:

Be it known that I, Monnuon Mnnmss, a citizen of the United States,residing at Flint, in the county of Genesee, State of Michigan, haveinvented certain new and useful Improvements in Drill-Presses; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to new and useful improvements in drill pressesand has particular reference to means for the purpose of readilyremoving the tapered shank of a tool from the spindle of the drillpress.

The object of the present invention is to improve the structure embodiedin my copending application for patent filed Nov. 5, 1912, Sr. No.729,672 and resides particularly in the provision of novel means forresiliently urging the tool shank engaging member away from the toolshank.

A further object resides in the provision of such resilient means as areeflicient and durable in operation and may be associated with thevarious parts of the structure embodied in my previous application in amanner conducive to simplicity and cheapness of manufacture.

'With these and other objects in view, the

invention resides in the novel combination, formation and arrangement ofparts to be hereinafter more fully described and illustrated in theaccompanying drawings and particularly pointed out in the claims heretoappended.

Reference is had to the accompanying drawings wherein similar charactersof reference designate corresponding parts throughout the several views,and in which:

Figure 1 is a vertical sectional view through a drill press equippedwith my improved spring means. Fig. 2 is a fragmentary enlarged view ofthe lower portion thereof, and Fig. 3 is a cross sectional view on theline 33 of Fig. 2.

Referring now more particularly to the accompanying drawings, 5designates the spindle having at its lower end the hollow squared head 6for receiving the shank 7 of a tool. Surrounding the spindle is thesleeve 8 having diametrically alined slots carrying the key 9 which isslidable in a slot 10 in the spindle. The usual outer sleeve 11surrounds the sleeve 8. The above parts are those embodied in myprevious application. It is seen that the tool shank 7 extends into theslot 10 and that upon downward movement of the sleeve 8 by means of thecam A the key 9 will be forced against the end of the shank to loosen itin the head and allow it to drop out.

The improved means for resiliently holding the key and sleeve away fromthe tool shank 7 consists in cutting diametrically opposed semi-circulargrooves 12 in the spindle. These grooves extend from the slot 10 asuitable distance up the spindle. Connect ing the upper portion of thegroove is a transverse passage 13 in which is seated a pin 1% having itsends extended into said groove. Tension springs 15 are provided and havetheir upper ends secured to the ends of the ,pin and have their lowerends passed around the key, said lower ends be ing seated in grooves 16in the key to prevent their displacement.

From the foregoing it is observed that a very simple means has beenprovided for resiliently urging the key and sleeve away from the head ofthe spindle, said means being obviously simpler than those embodied inthe previous application, afore-mentioned.

What is claimed is:

1. In a drill press, a spindle having a head provided with a taperedshank receiving socket, said spindle being further provided with atransverse slot communicating with the socket and with longitudinalgrooves communicating with the slot, a key slidable in the slot, a pin.transversely passed through the spindle above the slot and having itsends disposed in the grooves, tension springs in the grooves havingtheir ends secured to the pin and to the key, and means for forcing saidkey downwardly.

2. In a drill press, a spindle having a head provided with a taperedshank receiving socket, said spindle being further provided with atransverse slot communicating with the socket and also provided withlongitudinal grooves communicating with the slot, a sleeve surroundingsaid spindle, a key slidable in the slot, a pin extending transverselythrough the spindle above the slot and having its ends disposed in thegrooves, tension springs in the grooves liziv- 7 In testimony whereof, Iaffix my signa- ::ing their ends secured to the pin 1and (1130 the hire,in the presence of two Witnesses.

Key, and means 101' forcing said my OWIlv wardly against the bottom ofsaid slot, said MOB-DUCK MERLISS' means comprising the engagement ofsaid Witnesses:

sleeve With said key and mechanism for WILLIAM T. HYNEs,

forcing said sleeve downwardly. P. E. ARMOR.

Copies of this patent may be obtained for five cents each by addressingthe Commissioner of Patents,

Washington, D. C.

